Steam-generator.



r a M d t n e t a P R E On 8 E H c s B C 7 STEAM GENERATOR, (Application filed Jan. 19, 1900. Renewed Aug. 29, 1900.

2 Sheets-Shaet 1.

(No Model.)

TH: Nom'us PETERS cow mm'au'ruo WASHINGTON, 0. c4

No. 669,947. Patented Mar. l2, l90l.

c. B. SCHEBRER. STEAM GENERATOR. (Application filed Ja'n. 19, 1900. Renewed Allg'. 29, 1900.) (No Mo-d el.) 2 Sheets-Sheet 2.

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NlTiii) Sir/W ATENT "FFICE.

CHARLES BENJAMIN SCHERRER, OF BELLEVUE, KENTUCKY.

STEAM-G EN ERA-roe.

SPECIFICATION forming part of Letters Patent No. 669,947, dated March 12, 1901.

Application filed January 19, 1900. Renewed August 29, 1900. Serial No. 28,429. \lilo model.)

To all whom, it may concern.-

Be it known that 1, CHARLES BENJAMIN SCHERRER, a citizen of the United States of America, and a resident of Bellevue, in the county of Campbell and State of Kentucky, have invented certain new and useful Improvements in SteatnGenerators, of which the following is a specification.

This invention relates to certain improvements in steam-generators, and particularly that class of boilers which are designed for quick generation of steam-such, for example, as boilers for fire-engines, automobiles, and the like; and the object of the invention is to provide a generator of this general character which shall be of a simple and inexpensive nature and of a strong and compact construction, so as to give the maximum of heating'surface and generating effect with a minimum of weight and of expenditure of fuel.

The invention consists in certain novel features of the construction; combination, and arrangement of the several parts of the improved generator whereby certain important advantages are attained and the device is made simpler, cheaper, and otherwise better adapted and more convenient for use, all as will be hereinafter fully set forth.

The novel features of the invention will be carefully defined in the claims.

In the accompanying drawings, which serve to illustrate my invention, Figure 1 is a plan view showing a generator constructed according to my invention. Fig. 2 is a vertical seclion taken on the line a. or in Fig. 1. Fig. 3 is an under side view of the upper part or shell of the improved generator. Fig. 4 is a vertical section taken on the line b b in Fig. 2. Fig. 5 is a transverse section taken on the line 0 c in Fig. 4. Fig. 6 is a perspective view showing a modified form of the improved generator. Fig. 7 is a sectional view similar to Fig. 5 and illustrating another modified form of the improved generator. Fig. 8 is a view also similar to Fig. 5, but showing still another modified arrangement of the improved generator.

Referring first to Figs. 1 to 5, 1 indicates the lower part or shell, and 2 the upper part or shell, of the generator, said generator being formed by casting or otherwise in these two parts or shells, which are of circular or "to suit particular cases.

rounded form, as herein shown, although they may be made in other forms, if desired, The parts or shells l and 2 are provided with circumferential flanges 3 .and 4, respectively, which flanges are laid flush on each other and perforated at intervals for the passage of bolts 5 for securing the two parts together.

The lower part 1 of the generator is formed with a central depressed portion 6, chambered or hollowed out on its upper side, and the upper part 2 is similarly provided with a depressed central portion 7, adapted to coincide with and fit within the hollow of the lower part 1, as shown in Figs. 2 and 4, the flanges 3 and 4 of the parts or shells being so proportioned and located that a space or chamber 8 is left between the central depressed portions 6 and 7 of the parts 1 and 2, which space forms the water-space of the boiler and separates the portions 6 and 7 at all points, so as to prevent burning out.

The upper part 2 of the generator is also formed by preference with a hood 9, extending above it, as shown in Figs. 2 and 4, and

formed integrally with it, said hood 9 being hollowed out, as indicated at 10, to produce a steam-dome for holding a sufficient quantity of steam. The hollow 10 of the dome or hood 9 communicates at opposite sides with the space 8 between the parts 1 and 2 by way of openings 11 11, located at points between the depressed portion 7 and the flange 4 of the upper part 2. The hood 9 is extended up above and across the central depressed portion 7 of the upper part 2 of the generator to produce a central space or chamber 12 between the steam-dome and the depressed portion 7, with which space or chamber 12 communicate lateral passages 13 13, extending beneath the hood or dome 9 at opposite sides of the generator, as shown in Figs. 2 and 4. The passages 13 serve to admit a feed-water pipe 14, which extends laterally through the same and is bent down within the space or chamber, as shown at 15, and screws into a boss 16, centrally formed in the depressed portion 7 of the shell 2, so as to supply water to the central lower part of the space 8 between the shells 1 and 2 of the genorator.

In operation when a fire is started under the central depressed portion 6 of the generator the flames and hot gases are caused to pass up around said portion 6, so as to come into close contact with the same and heat the water in the water-space 8. As said waterspace is extremely thin compared with the extent of heating-surface, it is evident that a very quick generation of steam will be effected, the course of the steam being upward and outward through the openings 11 into the steam-dome 9. The depressed portions of the shells are, as herein shown, made in invertedcone shape, so that the water-space 8 is also of inverted-cone shape, its flaring portion being upward. By this arrangement the feedwater being admitted at the central lower part of the flaring water-space is given room to expand upward and outward as it becomes heated and is converted into steam.

In Fig. 4 I have shown a spacing-ring or gasket 24 held between the flanges 3 and 4 of the shells l and 2, so as to give greater thickness to the water-space 8 by separating the portions 6 and 7 of the shells 1 and 2, so as to adapt the boiler for use in heating water, &c.

The construction of the improved boiler is such that it may be readily taken apart to clean it from scale'or sediment, and the device also combines great strength and generative capacity with compactness,cheapness, and simplicity, so as to render it especially adapted for use wherever these qualities are desired. The generator is also adapted for special use with an oil-burner or other suitable heating means.

In Fig. 7 I have shown a modified form of the generator wherein the walls of the depressed portions 6 and 7 of the shells l and 2 are formed, with radiating corrugations or fiutings 25, corresponding with each other and serving to increase the surface of the shell in contact with the flames and hot gases, as well as to increase the heating-surface within the water-chamber S. A similar form of the generator is shown in Fig. 8, except that the flutings or corrugations 25 are replaced by radiating ribs 26, hollowed on their innersurfaces and formed only in the depressed portion.6 of the lower shell 1.

It will be obvious from the above description that the improved generator is capable of some modification without material departure from the principles and spirit of the invention, and for this reason I do not wish to be understood as limiting myself to the precise form and arrangement of the several parts as herein set forth. For example, in some cases, as shown in Fig. 6, the integral dome (shown in Figs. 1 to 4) maybe dispensed with and the upper part 2 of the generator be formed at opposite sides of its central depressed part 7 with bosses 20 to receive pipes 21, extending upward and connecting at opposite ends of a cylindrical dome 22 above the generator. The feed-water pipe 14, leading into the water-space 8, is in this case coiled in the central space of the upper shell, as shown at 23, and the steam-exit pipe 18 connects with the dome or drum 22. Further, it will be evident that the depressed central portions of the generator may be made in forms other than the conical form shown hereinas, for example, they maybe spheroidal with convexity downward or in elongated formand, if desired, as indicated at 19 in Fig; 5, the under side of the depressed portion 6 of the shell 1 may be made with integral solid radiating ribs projecting from it to secure greater surface for contact with the flames and hot gases.

Having thus described my invention, I claim- 1. A steam-generator formed of two parts or shells each having its edge portion ex tended in one plane to form an annular flange, said parts or shells having their flanges secured together and their central portions spaced away from each other to produce between them a thin water-space, substantially as set forth.

2. A steam-generator formed of two parts or shells having depressed central portions gradually increasing in diameter and spaced away from each other to produce between them a thin water-space, said water-space being of gradually-increasing diameter, substantially as set forth.

3. A steam-generator formed of two parts or shells having depressed central portions of rounded and tapered form and spaced away from each other to produce between them a thin water-space also of rounded form and gradually-increasing diameter, substantially as set forth.

4. A steam-generator formed of two parts having depressed central portions of rounded and tapered form and spaced away from each other to produce between them a thin waterspace also of tapered and rounded form, and a feed-water pipe communicating with the water-space atthe center thereof, substantially as set forth.

5. A steam-generator formed in two parts or shells spaced away from each other to produce a thin water-space between them, the upper part being formed with an integral hollow hood having communication with said water-space, substantially as set forth.

6. A steam-generator formed in two parts having depressed coincident central portions spaced apart to produce a thin water-space between them, the upper part having a space or chamber within its depressed portion, a feed-water pipe extended in said space or chamber and a steam-dome arranged over said chamber or space and having com mu nication with the water-space between the two parts, substantially as set forth.

Signed by me at Cincinnati, Ohio, this 15th day of January, 1900.

CHARLES BENJAMIN SCHERRER.

Witnesses:

ERNST P. KRIEGHOFF, JOHN ELIAS JONES. 

